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Related Topic: Measurement of Diffusion Coefficient of Chemicals

  • Toshinobu SekiEmail author
  • Ryotaro Miki
Chapter

Abstract

Some physical penetration-enhancing techniques may create permeation routes in the skin barrier, which may involve water channels for the hydrophilic drugs. In those processes, diffusion in the channels is the major mechanism of transport, and thus, the diffusion coefficient (D) in aqueous medium could be a primary factor for assessing permeation through the skin barrier. Several experimental methods to determine D for chemical compounds in water or other solvents are described in this chapter.

Keywords

Diffusion coefficient Diffusion cell Permeation Porous-plate method Chromatographic broadening method Dynamic light scattering Nuclear magnetic resonance 

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Copyright information

© Springer Japan KK 2017

Authors and Affiliations

  1. 1.Faculty of Pharmacy and Pharmaceutical SciencesJosai UniversitySakadoJapan

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